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John, Manju Mary, MD





Providing the best care to our patients and their companions requires communicating in a way everyone understands. Interpreter services are available 24 hours a day, 7 days a week, 365 days a year. All spoken languages are available, as well as American Sign Language (AS/L).

Accepting New Patients
  • Cardiovascular Medicine
  • Nuclear Cardiology
Not Currently Accepting New Patients
  • Internal Medicine

Areas of Expertise
Cardiac Arrhythmias, Echocardiography, Heart Failure, Non-Invasive Cardiovascular Medicine, Valvular Heart Disease


Maimonides Medical Center

Coney Island Hospital

Medical School
Kerala University (India)

Coney Island Hospital

Professional Organizations

  • American College of Cardiology, Member
  • American College of Echocardiography, Member
  • Society of Diagnostic Medical Sonography, Member


Verified Patient Reviews

5 out of 5 stars

I so respect *Dr. John! She is so very wonderful! I trust her advice, finding it works for me. I always recommend her. She is the best.

5 out of 5 stars

Dr john was awesome

5 out of 5 stars

DOCTOR JOHN Manju and her assistant was awesome

3 out of 5 stars

Had me call my electrophysiologist due to disagreement in his treatment. Why didn't she call him - took me a week for answer.

5 out of 5 stars

I have been seeing Dr.John for several years.The way she treats patients is with respect and is clear in her instructions.

3 out of 5 stars

I think Dr J was having a bad and /or stressful day

5 out of 5 stars

Very caring & professional.

Other Reviews from Around the Web

5 out of 5 stars

Dr.John is outstanding! The staff is wonderful as well.


Aetna, Anthem, BCBS Medicare, CarePartners of Connecticut, Cigna Healthcare, Colonial Cooperative Care, Community Health Network of Connecticut, Inc., Connecticare, Connecticare Commercial, Connecticare Medicare, Corvel, Coventry, Essence Healthcare, Evercare, First Health Group Corp., Focus, Harvard Pilgrim, Health Connecticut, Health Direct, Health New England, Healthy Connecticut, Multiplan, Northeast Health Direct, One Health Plan/ Great-West Healthcare, Oxford Health Plans, Prime Health Services, Private Health Care Systems, Inc., Senior Whole Health, United Healthcare, WellCare of Connecticut, Inc.

This information is subject to change at any time. Please check with your insurance provider before scheduling your appointment or receiving services to confirm they are a participating member of the Hartford HealthCare network.